We have investigated the nature of the photocurrent generated by Photosystem II (PSII), the water oxidizing enzyme, isolated from Thermosynechococcus elongatus, when immobilized on nanostructured titanium dioxide on an indium tin oxide electrode (TiO2/ITO). We investigated the properties of the photocurrent from PSII when immobilized as a monolayer versus multilayers, in the presence and absenc...

We reported Ce and its oxide-modified TiO2 nanotube arrays (TNTs) and their semiconductor properties. The TNTs were prepared by anodic oxidation on pure Ti and investigated by electrochemical photocurrent response analysis. Then, the TNT electrodes were deposited of Ce by cathodic reduction of Ce(NO3)3 6H2O. After deposition, the TNT electrodes were fabricated by anodic oxidation at E = 1.0 V(S...

Intrinsic photogeneration of charge carriers in anthracene .1-4 single crystals occurs with photon energies in excess of 4 eV The mechanism of this process, however, is not well understood. The interpretation of the wavelength dependence of this current in 2 £\ particular is difficult. Two maxima in the photocurrent appear, <sJLJ one at 4.4 eV ' ' and the other at 5.4 eV. The 4.4 eV maximum app...

Uniform photocurrent densities can be achieved in waveguide photodetectors by tailoring the extension length of an index-matching layer in eont of the diode. We demonstrate up to 9dB improvement in RF linearity at 2OGHz. Introduction: Spur hx Dynamic Range (SFDR), RF insertion loss and signal to noise ratio of analog fiber optic links improve with increasing maximum linear photocurrent [I]. The...

Due to their small size and high electrical conductivity, carbon nanotubes (NT) have emerged as one of the most promising nanomaterials for biological and biomedical sensing applications. We have developed an optoelectronic imaging system which combines NT transistors with optical trapping techniques and scanning photocurrent microscopy to investigate the interaction between a suspended carbon ...

In this paper we report, for the first time, the alignment enhanced photoconductivity of single wall carbon nanotube films upon laser illumination. The photoconductivity exhibited an increase, decrease or even 'negative' values when the laser spot was on different positions between contact electrodes, showing a 'position' dependent photoconductivity of partially aligned films of carbon nanotube...

Photocurrent was observed upon monochromatic illumination of an ITO electrode coated with a TiO2 nanocrystalline mesoporous membrane with carotenoid 8′-apo-b-caroten-8′-oic acid (ACOA) deposited as a sensitizer (illuminated area 0.25 cm2) and immersed in an aqueous 10 mM hydroquinone (H2Q), 0.1 M NaH2PO4 solution (pH = 7.4) purged with argon, using a platinum flag counter electrode (area 3.3 cm...